24 Jun
2005
24 Jun
'05
8:12 p.m.
All:
OK, I'm ready to burn a modified copy of the Altair Turnkey Monitor
into a 2708 to use in my 8800b as a test program. Lo and behold, my
programmer won't do a 2708 -- it'll only go down to 2716. Naturally I don't
have any 2716s around and the VG ROM board accepts only the 2704 or 2708
(without modification).
So I browsed around eBay and elsewhere to see if any other
programmers support the 2708 and it seems that none do. They all start at
the 2716.
What programmer can I look for that has the ability to program a
2708?
Thanks.
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
25 Jun
25 Jun
7:25 a.m.
I have a DataI/O model 19 and I think I have a 2708 plug-in for it. The
reason that most programmers don't support the 2708 is because it requires
three voltages to operate. Come to think of it, I have a couple of old
Prolog programmers and I think that I may have 2708 plug-ins for one of
them too. FWIW I bought the Prolog units because they were all I could find
that would program the 1702s.
Joe
At 11:12 PM 6/24/05 -0400, you wrote:
All:
OK, I'm ready to burn a modified copy of the Altair Turnkey Monitor
into a 2708 to use in my 8800b as a test program. Lo and behold, my
programmer won't do a 2708 -- it'll only go down to 2716. Naturally I don't
have any 2716s around and the VG ROM board accepts only the 2704 or 2708
(without modification).
So I browsed around eBay and elsewhere to see if any other
programmers support the 2708 and it seems that none do. They all start at
the 2716.
What programmer can I look for that has the ability to program a
2708?
Thanks.
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
2:24 p.m.
I have a DataI/O model 19 and I think I have a 2708 plug-in for it. The
reason that most programmers don't support the 2708 is because it requires
three voltages to operate. Come to think of it, I have a couple of old
Not just that, the programming algorithm is different to most other
EPROMs. IIRC you have to program all locations in sequence, giving each
one a 1ms (IIRC) programming pulse, and repeat that 50 times. You can't
program odd locations like you can in later EPROMs.
FWIW, I thiok the 3rd party progammer I have for the Nascom does 2708s.
And I haev at least one plug-in card for the Apple ][ that claims to
program them. And a stnad-alone programmer controlled by an SC/MP that
does just about everything from 2704s to 2732s.
-tony
2:52 p.m.
Hi, gang,
*********** REPLY SEPARATOR ***********
On 25-Jun-05 at 22:24 ard at p850ug1.demon.co.uk wrote:
<snippety>
Out of curiousity, I checked the support list for my UniSite system. Sure enough, it
supports the 2708's. However, it won't do 2704's.
I suspect that support for multi-voltage devices like the '08's would only be
found in very old device programmers (like the Model 19), and in much later
'pin-driver' technology type systems (like the UniSite), with little or no
crossover in between the high and low-end.
Keep the peace(es).
-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal
ports?"
I have a DataI/O model 19 and I think I have a 2708 plug-in for it. The
reason that most programmers don't support the 2708 is because it
requires
three voltages to operate. Come to think of it, I
have a couple of old
Not just that, the programming algorithm is different to most other
EPROMs. IIRC you have to program all locations in sequence, giving each
one a 1ms (IIRC) programming pulse, and repeat that 50 times. You can't
program odd locations like you can in later EPROMs. 
10:19 a.m.
OK, I'm ready to burn a modified copy of the
Altair Turnkey Monitor
into a 2708 to use in my 8800b as a test program. Lo and behold, my
programmer won't do a 2708 -- it'll only go down to 2716.
<snip>
What programmer can I look for that has the ability
to program a
2708?
Cromemco 8K Bytesaver in an S-100 system.
28 Jun
28 Jun
6:25 p.m.
On Fri, 24 Jun 2005 23:12:29 -0400
"Richard A. Cini" <rcini at optonline.net> wrote:
All:
OK, I'm ready to burn a modified copy of the Altair Turnkey
Monitor
into a 2708 to use in my 8800b as a test program. Lo and behold, my
programmer won't do a 2708 -- it'll only go down to 2716. Naturally I
don't have any 2716s around and the VG ROM board accepts only the 2704
or 2708(without modification).
So I browsed around eBay and elsewhere to see if any other
programmers support the 2708 and it seems that none do. They all start
at the 2716.
What programmer can I look for that has the ability to program a
2708?
Thanks.
I believe an Intel MDS will program a 2708. And then you have the
privledge of using an i4040 processor to burn your EPROM since there's
one inside the EPROM programmer peripheral. I got the external
programmer with my MDS but haven't used it yet.
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
7116
days inactive
7120
days old
5 comments
6 participants
participants (6)
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